Continuous walking and time- and intensity-matched interval walking: Cardiometabolic demand and post-exercise enjoyment in insufficiently active,healthy adults

ABSTRACT

We compared cardiometabolic demand and post-exercise enjoyment between continuous walking (CW) and time- and intensity-matched interval walking (IW) in insufficiently active adults. Sixteen individuals (13 females and three males, age 25.3 ± 11.1 years) completed one CW and one IW session lasting 30 min in a randomised-counterbalanced design. For CW, participants walked at a mean intensity of 65–70% predicted maximum heart rate (HR_max). For IW, participants alternated between 3 min at 80% HR_max and 2 min at 50% HR_max. Expired gas was measured throughout each protocol. Participants rated post-exercise enjoyment following each protocol. Mean HR and V˙O₂ showed small positive differences in IW vs. CW (2, 95%CL 0, 4 beat.min^?1; d = 0.23, 95%CL 0.06, 0.41 and 1.4, 95%CL 1.2 ml.kg^?1.min^?1, d = 0.36, 95%CL 0.05, 0.65, respectively). There was a medium positive difference in overall kcal expenditure in IW vs. CW (25, 95%CL 7 kcal, d = 0.58, 95%CL 0.33, 0.82). Post-exercise enjoyment was moderately greater following IW vs. CW (9.1, 95%CL 1.4, 16.8 AU, d = 0.62, 95%CL 0.06, 0.90), with 75% of participants reporting IW as more enjoyable. Interval walking elicits meaningfully greater energy expenditure and is more enjoyable than CW in insufficiently active, healthy adults.     

'She just got me’: supporting care experienced young people negotiating relationships and identities at school

In this article we examine the complex relationship between care experience, mental health and exclusion from school and how young people (YP) negotiate these different experiences and identities. The study is a secondary analysis, informed by symbolic interactionist theory, of interviews conducted with 19 care experienced YP in Scotland. Not all of the YP were excluded and not all had a formal mental health diagnosis, as such our study design allows interrogation of the contexts and relationships which not only facilitate but also disrupt pathways to exclusion. It also allows reconsideration of assumptions of vulnerability which are often applied to care experienced YP. Our findings suggest that these YP are moving beyond ‘role playing’ the identities ascribed to them and actively seek out relationships which enable them to construct alternative identities.     

Optimised force-velocity training during pre-season enhances physical performance in professional rugby league players

ABSTRACT

The effectiveness of 8-week force-velocity optimised training was assessed in highly trained professional rugby league athletes. Players (age 24 ± 3 years; body mass 94.9 ± 21.6 kg; height 181.3 ± 6.0 cm) were strength-matched and assigned to a force-velocity optimised group (OP; n = 15) or a general strength-power group (GP; n = 14). Tests included 10-m, 20-m sprints, 3 repetition-maximum squat and squat jumps over five load conditions to ascertain vertical force-velocity relationship. ANCOVA revealed there was a group effect for force-velocity deficit (P < 0.001), with the OP two-fold greater than the GP group (OP pre: 51.13 ± 31.42%, post: 62.26 ± 31.45%, GP pre: 33.00 ± 19.60%, post: 31.14 ± 31.45%, P < 0.001). There were further group effects for 3RM squat (OP pre: 151.17 ± 22.95 kg, post: 162.17 ± 24.16 kg, GP pre: 156.43 ± 25.07 kg, post: 163.39 ± 25.39 kg, P < 0.001), peak power (OP pre: 3195 ± 949 W, post: 3552 ± 1033 W, GP pre: 3468 ± 911 W, post: 3591 ± 936 W, P < 0.001), and SJ (OP pre: 39.79 ± 7.80 cm, post: 42.69 ± 7.83 cm, GP pre: 40.44 ± 6.23 cm, post: 41.14 ± 5.66 cm, P < 0.001). Prescribing F-V deficit training is superior for improving physical performance within highly trained RL players.     

Gut microbiota and obesity:Impact of antibiotics and prebiotics and potential for musculoskeletal health

Obesity is a complex disease with multiple contributing factors.One of the most intensely studied factors during the past decade has been the gut microbiota,which is the community of all microbes in the intestinal tract.The gut microbiota,via energy extraction,inflammation,and other actions,is now recognized as an important player in the pathogenesis of obesity.Dysbiosis,or an imbalance in the microbial community,can initiate a cascade of metabolic disturbances in the host.Early life is a particularly important period for the development of the gut microbiota,and perturbations such as with antibiotic exposure can have long-lasting consequences for host health.In early life and throughout the life span,diet is one of the most important factors that shape the gut microbiota.Although diets high in fat and sugar have been shown to contribute to dysbiosis and disease,dietary fiber is recognized as an important fermentative fuel for the gut microbiota and results in the production of short-chain fatty acids that can act as signaling molecules in the host.One particular type of fiber,prebiotic fiber,contributes to changes in the gut microbiota,the most notable of which is an increase in the abundance of Bifidobacterium.This review highlights our current understanding of the role of gut microbiota in obesity development and the ways in which manipulating the microbiota through dietary means,specifically prebiotics,could contribute to improved health in the host,including musculo skeletal health.     

论体育舞蹈对大学生心理健康的影响

基于《全民健身计划纲要》的实施,发展到全民健身热潮的今天,体育锻炼意义不仅仅在于健身,同时也在于健心。体育锻炼对于心理健康发挥了重要的作用,并且也逐渐得到人们的重视。本文基于大学生的了解度与兴趣状况与学习体育舞蹈后的心理健康评价调查,探究体育舞蹈对大学生心理健康的影响,结果表明,体育舞蹈对大学生的心理健康具有积极影响,希望能够对今后的教育教学有一定帮助作用。     

铜仁市少数民族村落体育发展研究

本文通过文献资料法、专家访谈法,对铜仁市少数民族村落体育发展进行研究,在现状调查中发现,铜仁市少数民族村落体育发展存在以下困境:(1)少数民族村落体育参与主体的缺乏;(2)少数民族村落体育保护的政策制度不健全;(3)少数民族村落体育资源开发不合理。针对存在的现实困境,特制定以下发展措施:(1)因地制宜,政府部门制定保护与发展政策;(2)加深乡村旅游与少数民族村落体育融合发展;(3)加强引导,确立村民的文化自信感;(4)丰富少数民族村落体育锻炼内容,提高村民参与度。     

加强学校体育促进中学生体质健康研究

改革开放后,中国经济不断发展,人们生活水平不断提高。国家需要培养包括德、智、体、美、劳5个方面都符合要求的人才,我国在教育方面的投入很多。这就是我国进行体育教育的原因,引起了前所未有的关注。然而,在传统的中学教育的影响下,一些学校仍然没有发展体育教育,而是用文化课程代替了体育教育。为了提高学生的身体质量,作为当前学校体育运动强劲发展的一部分,中学应继续关注体育锻炼并改善体育锻炼,这很可能需要根据各个学生的兴趣来实施。为了提高中学生的体育表现,学校需要明确体育锻炼目标,使中学生的身体素质得到全面提高。     

学生体质健康的影响因素与学校体育的应对

学生的健康会直接决定国民健康水平。因为传统教育理念的影响,体育教育并不被重视的,按时随着近些年全民锻炼等意识理念的不断推广,学生体质问题越发突出,持续提高体育教育整体质量水平显得非常重要。对此,为了进一步提升体育教育质量,本文简要分析高校学生体质健康的影响因素与学校体育的应对策略,希望可以为相关教育者提供一定帮助。     

体育与健康的研究综述

全民都获取全面的健康是能否成为强国的重要标准之一,是"以人为本"的基本体现。在健康中国行动的背景下,国家越来越重视以体育健身来促进人民的健康发展,也相继出台了一系列关于全民健康相关的文件和纲要。本文通过对国内国外研究现状进行了分析,通过对体育健康的梳理,了解体育健康目前发展现状,分析不足之处,为体育健康在以后的界定打下基础。     

现代信息技术背景下普通高校课外体育活动创新研究

随着现代信息技术的快速发展,"互联网+"这一概念频繁出现在公众视野。同时,,对高校体育事业的发展也产生了不可估量的影响。在《体育发展"十三五"规划》中,再次表明要实施"互联网+体育"战略,要将"互联网+"与全民运动融合到一起。本文在简要分析高校大学生课外体育活动现状基础上,重点探讨了基于手机APP创新普通高校课外体育活动的具体建议。